Free Printable General Biology 2

1.

When you breathe, your lungs take in ___ and remove ___.

a)

air/oxygen

b)

oxygen/carbon dioxide

c)

carbon dioxide/waste

d)

waste/air

2.

The air sacs that are covered with capillaries where gas exchange takes place

a)

bronchi

b)

lungs

c)

oxygen

d)

alveoli

3.

What is the site of gas exchange?

a)

alveoli

b)

bronchus

c)

nose

d)

trachea

4.

The division of the trachea forms

a)

main bronchi

b)

alveoli

c)

lungs

d)

nose

5.

Which of the following are features of the alveoli that adapt them to gas exchange?

I. High surface area

II. Thin walls

III. Dry surfaces

a)

I and II only

b)

I only

c)

II and III

d)

I, II, and III

6.

What is the name of two main branches from the trachea (one to each lung)?

a)

bronchi

b)

alveoli

c)

capillaries

d)

bronchioles

7.

Given the following structures:

1. alveoli

2. bronchi

3. bronchioles

Which of the following is the correct order in which air would flow after inhalation?

a)

1,2,3

b)

2,1,3

c)

2,3,1

d)

3,2,1

8.

What happens when you breathe in? (tick all that apply)

a)

diaphragm relaxes and moves up

b)

diaphragm contracts and flattens

c)

increases volume in thorax

d)

reduces volume in thorax

9.

What adaptations does the alveoli have for efficient gas exchange?

a)

thick walls

b)

thin walls

c)

small surface area

10.

what is found around alveoli?

a)

capillaries

b)

pleura

c)

lymphatic nodes

d)

saliva

11.

How breathing is controlled?

a)

medulla oblongata

b)

cardiac muscle

c)

lungs

d)

capillaries

12.

What is sign for brain to send impulse for breathing?

a)

high CO₂ level

b)

low CO₂ level

c)

high O₂ level

d)

high blood concentration

13.

Diaphragm is

a)

part of lungs

b)

muscle that helps in breathing

c)

throat muscle

d)

structure in bones

14.

Which of the following is not happening during inhalation?

a)

the diaphragm contracts

b)

the rib cage rises up

c)

expands the volume of the chest cavity

d)

diaphragm is relaxing

15.

During gas exchange what enters from alveoli to the capillaries?

a)

CO₂

b)

CO

c)

O₂

d)

nitrogen

16.

What structure in the leaf is the entry point of gases in plants?

a)

Guard cells

b)

Mesophyll

c)

Palisade

d)

Stoma

17.

Which of the following organisms exemplify gas exchange through the moist skin?

a)

Earthworm

b)

Fish

c)

Human

d)

Snake

18.

Which structures in an arthropod allows the entry of gases into its body?

a)

Gills

b)

Lung

c)

Skin

d)

Spiracles

19.

What would happen if the lower epidermis of the leaves of plants become too dusty?

a)

Oxygen can readily exit from the plant.

b)

Oxygen becomes abundant inside the plant.

c)

Carbon dioxide is trapped in the leaves for respiration.

d)

Carbon dioxide can hardly enter the plant resulting to reduced photosynthesis.

20.

When you hold your breath, which of the following gas changes in the blood first leads to the urge to breathe?

a)

Rising oxygen

b)

Falling oxygen

c)

Rising carbon dioxide

d)

Rising carbon dioxide and falling oxygen

21.

Where does gas exchange take place in the lungs?

a)

Alveolus

b)

Alveolar bronchiole

c)

Alveolar duct

d)

Bronchial tube

22.

Which of the following filters the air in the respiratory passage?

a)

Cilia

b)

Flagella

c)

Epithelial tissue

d)

Mucus

23.

What structure in the respiratory system protects us from choking?

a)

Epiglottis

b)

Larynx

c)

Pharynx

d)

Trachea

24.

What are referred to as extensions of specialized epidermal cells that increase the surface area for absorption in plants?

a)

micorrhizae

b)

root hairs

c)

root nodules

d)

secondary roots

25.

What happens in pulmonary circulation? In pulmonary circulation, there is an exchange of gases between the

a)

heart and the lungs.

b)

lungs and the kidneys.

c)

heart and the kidneys.

d)

heart and the body parts.

26.

What is transported by the xylem vessels in the vascular bundle?

a)

food

b)

glucose

c)

starch

d)

water

27.

Which of the following animals exhibit open circulatory system?

a)

frog

b)

insect

c)

man

d)

snake

28.

Which blood cell is responsible in bringing oxygen to the body cells?

a)

erythrocyte

b)

blood platelet

c)

leucocyte

d)

lymphocyte

29.

What is the process of removing water from plants?

a)

absorption

b)

circulation

c)

respiration

d)

transpiration

30.

1. Which blood vessel allows gas exchange with the cell?

a)

artery

b)

capillaries

c)

vein

d)

none

General Biology 2

Total questions: 30

Worksheet time: 15mins

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